WP-API/WP-API — pull request #599 by Shelob9 (2014-11-11 20:48:46+00:00)
Title: Change param name for json_get_avatar_url() to $id_or_email

This is in response to #585, which calls for using user ID with this function. You could always do that, since this param goes to get_avatar()'s $id_or_email I have now renamed the parameter to match get_avatar() and along with the inline docs, reflect that it can take both email and id.